First timer, info much appreciated

Brooke • Chlomid user•2 MC•Irregular periods due to hormone imbalance•
My sister in law is pregnant and used this app to help her. I have been off BC for over 3 years now. My husband and I use condoms with no problems. We've been resenting kicking the idea of trying. I am not sure how long to be trying for since I do not know how this goes. Any suggestions will help. Has anybody gotten pregnant on their first fertile month after their period? Also, I am not taking any Prenatal pills and I've stopped drinking alcohol. I do not smoke and I work out very regularly.